Engraver&#39;s block.



No. 740,713, v` PATBNTED 00T. 6, 1903. L THIRION, ,ENGRAVERS BLOCK.

APPLIUATIONHLD JUNE 12. 1903., ,No MODEL.

no. 'wier/i3.

atented October 6, 1903. o

Fries,

Y FRANK'THIRION, or. NEW vonk; N; if;

ENGRAVERS BLOCK;

SPECIFICATON forming part of Letters Patent N 0. 740,713, dated October l6, 190.@i

Application filed June 12, 1903. Serial No. 161,133. (No model-l To all whom' t may concern: Y

Be it known that l, FRANK THIRION, a citizen of the United States,residin g at New York, in the county'of New York and State of New York, have invented certain new and useful Improvements in Engravers Blocks,of which the following is a specification, such as will enable those skilled in the art to which it appertains to make anduse the same.

The object of this invention is to provide an improved engravers block which is simple in construction and operation and compara,- tively inexpensive and Which maybe quickly and easily manipulated; and With this and other objects in view the invention consistsin a device of the class specied constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specification of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in Which'- Figure l is a side view of my improved engravers block; Fig. 2, a plan view thereof; Fig. 3, a central transverse vertical section on the line 3 3 of Fig. 2, and Fig. 4: a central transverse vertical section at right angles to that of Fig. 3.

In the practice of my invention I provide a main block member c, in Which is a transverse chamber a2, over Whichis secured a plate h, which has a transverse opening h2, which corresponds with the chamber a2, and said plate is provided centrally with a transverse member h3, which is provided' with downwardly-directed guides h4, and the ends of the chamber a2 are closed by plates a3, secured to the main blocka.

.Passing longitudinally through the chamber a2 and transversely of the. main block c is a shaft c, the opposite ends of which are provided With reverse threads and the extreme ends of which are reduced and passed into or through the plates a3, and into the ends of said shaft are sunk screws c2, the heads of which are countersunk in the plates a3, and the ends of said shaft are thus piv-v oted or provided with bearings in the plates c3.

The shaft c is provided centrally With a pinion or similar gear-Wheel d, which is rigidly secured thereto in any desired manner and which turns between the guide members b4 of the top plate h, and in the opposite ends of the chamber a2 are placed radiallymovable blocks @,havin g screw-threaded openings through which the shaft c passes, and the threads in these blocks are reversed threads to correspond Wiih the threads on the shaft c.' The blocks care provided with upwardly*- directed members c2, which pass through the opposite end portions of the slot h2 in the plate b, and pivoted thereto, as shown at e8, are radially movable and turnable clampingjawsf, having a large number of pin-holes f2, which maybe arranged in any desired man ner, but which are preferably arranged as shown in Fig. 2, and the clamping-jaws fare also of the general form shown in Fig. 2, or straight on their inner faces and segmental on their outer faces.

The block d is provided with a central depending member g, which is preferably cylindrical in cross-section, but which may be of any desiredlshape and which is provided Withv a central vertical chamber g2, in which is mounted a gear-Wheel g3, which operates in connection With the pinion oi'Mgear-Wheel d, and the Wheel g3 is mounted on a shaft g4, which passes transversely through the depending member g and on one end of which is mounted a sleeve 7L, provided with a knob or head h2. The shaft g4 is provided with a longitudinal slot g5 and Vthe sleeve h with a pin, Which passes into said slot and which limits the movement of the sleeve on the shaft; .but this construction may be reversed, if desired, and the sleeve h may be provided with a slot and the shaft g4 with apin. The sleeve h is also provided with a spring i, Which is secured thereto and which is provided at its free end with a pin or plug i?, which passes through a hole in the sleeve h and bears on the shaft, and thus causes a friction to prevent the too Vfree movement of thesleeve.

In practice holding pins or plugs are placed in the holes f2 in the clamping-jawsf, and the article to be engraved is placed between these pins or plugs in the usual manner and rests on the clamping-jaws f, and the said clamping-jaws are drawn together, so as to securely hold the article to be engraved by'turning the shaft g4, Which operates through the wheels g3 and d to turn the shaft c, which operation draws the movable blocks e and the clampingjaws f together.

When the sleeve h is in the position shown in Fig. 3, it does not project beyond the perimeter of the main block a, and this is the position of said sleeve when it is not desired to turn the shaft c; but when it is desired to turn said shaft the sleeve h is drawn out beyond the perimeter of the block a, as indicated in Fig. l, so that the head or handle h2 thereof may be grasped for the purpose of turningv the shaft g4 and the shaft c.

pro vided with a depending shaft, rod, or similar device j, by which said main block may be secured to any desired support in the usual manner; but this connection or support of the main block ce forms no part of my improve- I ment and istherefore not shown and described.

My improved engravers block or the parts f thereof may be easily manipulated and isalso l comparatively inexpensive, and my invention is not limited to the exact shape of the mai-n block a nor to the shape of the clamping-jaws 25 f, as herein shown and described, and various changes in and modifications of the details of the construction ofv the various parts of the device may be made without departing from 1 the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what i I claim as new, and desire to secure by Letters Patent, is-

said gear-wheel is secured, said main block being also provided in the top thereof with a l transverse chamber, a shaft mounted in said chamber and provided with a central gearwheel which operates in connection with the first-named gear-wheel, said shaft beingI provided at its opposite ends with'freverse threads, clamping-blocks mounted on the opf posite ends of said shaft and movable longitudinally thereof and provided with pivot members which pass upwardly through the top of the main block, and clamping-jaws pivoted to said pivot members and movable radially of the main block, said clampingjaws being provided in the top surface thereof with pin or plug holes, substantially as shown and described.

2. In a device of the class described, a main block provided with a central depending member in which is formed a vertically-arranged chamber or recess, a gear-wheel mounted in said chamber or recess, an operating shaft passing through said member and to which said gear-wheel is secured, said main block' being also provided in the top thereof witha transverse chamber, a shaft mounted in said The main block a or the part g thereof is chamber and provided with a central gearwheel which operates in connection with the first-named gear-wheel, said shaft being also provided at its opposite ends with reverse threads, clamping-blocks mounted on the opposite ends of said shaft and movable longitudinally thereof and provided with pivot members which pass upwardly through the top of th-e main block, and clampingjaws lpivoted to said pivot members and movable radially oi' the main block, said clampingjaws being provided in the top surface thereof with pi-n or plug holes and said operatingshaft 'being provided-at one end with a longitudinally-movable sleeve the outer end of which is provided with a knob or handle, substan- 1 tially as shown and described.

3. In a device of the class described, a main block provided in the top with a transverse y chamber, a shaft mounted in said chamber and provided at its opposite ends with reverse l. Inadevice ofthe class described, a main g block provided with a centraldependin g mem- 5 ber in which is formed a vertically-arranged chamber or recess, a gear-wheel mounted in 3 said chamber or recess, an operating shaft j passing through said member and to whichg comprising an operating-shaft `geared in connection therewith and provided at one end with a longitudinally-movable sleeve having a knob or handle, substantially as shownand described.

In testimony that I claim the foregoing as my invention I have signed my naine, in presence ofthe subscribing witnesses, this 6th day FRANK TIIIRION.

Witnesses:

F. A. STEWART, C.. E. MULREANY.

ZOO 

